The value of vRtrFibPriority specifies the priority of updating
set of routes into the forwarding plane.
If the value of vRtrFibPriority for the VPRN is set to 'high',
the FIB (Forwarding Information Base) entries for the VPRN are
given priority over all other routes.
By default the vRtrFibPriority for a VPRN is set to 'standard'
which means the FIB entries for the VPRN do not have any
preference over routes from other VPRNs.